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1、第32卷第3期干旱地區(qū)農(nóng)業(yè)研究V01.32No.32014年5月iculturalResearchintheAridAreasMav2014干旱對小麥孕穗期葉片生理特性及產(chǎn)量的影響張軍,劉紅2,李曉萍,魯敏,孫樹貴,蘇佳妮,劉淑慧,陳新宏lI4(1.西北農(nóng)林科技大學(xué)農(nóng)學(xué)院,陜西楊凌712100;2.岐山縣種子管理工作站,陜西岐山722400;3.興平市種子管理站,陜西興平713100;4.陜西省植物遺傳工程育種重點(diǎn)實(shí)驗(yàn)室,陜西楊凌712100)摘要:為明確土壤干旱對孕穗期小麥生理特性和產(chǎn)量的影響,選用小偃22等7個(gè)冬小麥品種材料,通過盆栽控水方式
2、,測定孕穗期葉片中超氧化物歧化酶(SOD)、過氧化物酶(POD)及過氧化氫酶(CAT)活性、相對電導(dǎo)率、丙二醛(MDA)含量等生理和產(chǎn)量指標(biāo)結(jié)果表明,在中度和嚴(yán)重干旱下,小麥葉片中的SOD、POD和CAT活性、相對電導(dǎo)率值、MDA含量、可溶性糖和脯氨酸含量均有不同程度地提高;除晉麥47、小偃22、.矮抗58和西農(nóng)979的可溶性蛋白含量有所增加外,其余品種均下降。干旱脅迫下單株穗粒數(shù)、穗粒重和千粒重均顯著降低。經(jīng)主成分分析,供試品種的抗旱性依次為晉麥47>小偃22>矮抗58>西農(nóng)979>西農(nóng)509>鄭麥366>鄭麥9023。關(guān)鍵詞:小麥;土壤干旱;
3、孕穗期;葉片;生理特性;產(chǎn)量;抗旱性評價(jià)中圖分類號:S512.103文獻(xiàn)標(biāo)志碼:A文章編號:1000.7601(2014)03—0001—08EfectofdroughtonleafphysiologicalparametersandyieldofwheatatbootingstageZHANGJun,LIUHong,LIXiao.ping3,LUMin,SUNShu.gui,SUJia.ni,LIUShu—hui,CHENXin.hong,(1.AgronomyCollege,NoahwestA&FUniversity,Yangling,Sha
4、anxi712100,China;2.OishanCountySeedManagement,Qishan,Shaanxi722400,China;3.DivisionofXingpingSeedManagement,Xingping,Shaanxi713100,China;4.Shaanxi腳LaboratoryofC,enetwEngineeringforPlantBreeding,Yangling,Shaara~i712100,China)Abstract:Theobjectiveofthisworkistoelucidatetheefect
5、ofsoildroughtonleafphysiologicalparametersatbootingstageandyieldofwinterwheat.WeselectedXiaoyan22andother6cuhivarsasexperimentalmaterials,andmeasuredtheactivitiesofantioxidativeenzymesincludingthesuperoxidedismutase(SOD),peroxidase(POD),catalase(CAT),aswellasrelativeelectricc
6、onductivity,malondialdehyde(MDA)contentandotherphysiologicaltraitsunderdifferentwaterconditionsbypotexperiment.TheresultsshowedvariationsintheeffectofmoderateandseveredroughtstressonactivitiesofSOD,PODandCAT,relativeelectricconductivity,andcontentsofMDA,solublesugar,andpro—li
7、ne.SolubleproteincontentincreasedinJinmai47,Xiaoyan22,Aikang58,andXinong979,whileitdecreasedintheotherthreecuhivars.Grainsnumberperspike,grainweightperspikeandthe1000一grainweightsignificantlydecreasedunderdroughtstress.Principalcomponentanalysisshowedanorderofdroughtresistanc
8、eforthesecuhivars:Jinmai47>Xiaoyan22>Aikang58>Xinong979>Xinong509>Zh